We propose to perform a systematic search for new coronal holes which are expected to be formed in association with solar-filament disappearances, because, some disappearing-filament associated solar wind shock waves are seemed to be driven by transient high-speed streams. For an event associated with a solar filament disappearance on 22 April 1979, the relevant shock wave propagated with a constant speed for 14 hours, during a transient coronal hole was observed.